src/cypherpunks.ru/nncp/cmd/nncp-caller/main.go

   1 /*
   2 NNCP -- Node to Node copy, utilities for store-and-forward data exchange
   3 Copyright (C) 2016-2019 Sergey Matveev <stargrave@stargrave.org>
   4
   5 This program is free software: you can redistribute it and/or modify
   6 it under the terms of the GNU General Public License as published by
   7 the Free Software Foundation, version 3 of the License.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 GNU General Public License for more details.
  13
  14 You should have received a copy of the GNU General Public License
  15 along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16 */
  17
  18 // Croned NNCP TCP daemon caller.
  19 package main
  20
  21 import (
  22         "flag"
  23         "fmt"
  24         "log"
  25         "os"
  26         "strconv"
  27         "sync"
  28         "time"
  29
  30         "cypherpunks.ru/nncp"
  31 )
  32
  33 func usage() {
  34         fmt.Fprintf(os.Stderr, nncp.UsageHeader())
  35         fmt.Fprintf(os.Stderr, "nncp-caller -- croned NNCP TCP daemon caller\n\n")
  36         fmt.Fprintf(os.Stderr, "Usage: %s [options] [NODE ...]\n", os.Args[0])
  37         fmt.Fprintln(os.Stderr, "Options:")
  38         flag.PrintDefaults()
  39 }
  40
  41 func main() {
  42         var (
  43                 cfgPath   = flag.String("cfg", nncp.DefaultCfgPath, "Path to configuration file")
  44                 spoolPath = flag.String("spool", "", "Override path to spool")
  45                 logPath   = flag.String("log", "", "Override path to logfile")
  46                 quiet     = flag.Bool("quiet", false, "Print only errors")
  47                 debug     = flag.Bool("debug", false, "Print debug messages")
  48                 version   = flag.Bool("version", false, "Print version information")
  49                 warranty  = flag.Bool("warranty", false, "Print warranty information")
  50         )
  51         flag.Usage = usage
  52         flag.Parse()
  53         if *warranty {
  54                 fmt.Println(nncp.Warranty)
  55                 return
  56         }
  57         if *version {
  58                 fmt.Println(nncp.VersionGet())
  59                 return
  60         }
  61
  62         ctx, err := nncp.CtxFromCmdline(*cfgPath, *spoolPath, *logPath, *quiet, *debug)
  63         if err != nil {
  64                 log.Fatalln("Error during initialization:", err)
  65         }
  66         if ctx.Self == nil {
  67                 log.Fatalln("Config lacks private keys")
  68         }
  69
  70         var nodes []*nncp.Node
  71         if flag.NArg() > 0 {
  72                 for _, nodeId := range flag.Args() {
  73                         node, err := ctx.FindNode(nodeId)
  74                         if err != nil {
  75                                 log.Fatalln("Invalid NODE specified:", err)
  76                         }
  77                         if len(node.Calls) == 0 {
  78                                 ctx.LogD("caller", nncp.SDS{"node": node.Id}, "has no calls, skipping")
  79                                 continue
  80                         }
  81                         nodes = append(nodes, node)
  82                 }
  83         } else {
  84                 for _, node := range ctx.Neigh {
  85                         if len(node.Calls) == 0 {
  86                                 ctx.LogD("caller", nncp.SDS{"node": node.Id}, "has no calls, skipping")
  87                                 continue
  88                         }
  89                         nodes = append(nodes, node)
  90                 }
  91         }
  92
  93         var wg sync.WaitGroup
  94         for _, node := range nodes {
  95                 for i, call := range node.Calls {
  96                         wg.Add(1)
  97                         go func(node *nncp.Node, i int, call *nncp.Call) {
  98                                 defer wg.Done()
  99                                 var addrs []string
 100                                 if call.Addr == nil {
 101                                         for _, addr := range node.Addrs {
 102                                                 addrs = append(addrs, addr)
 103                                         }
 104                                 } else {
 105                                         addrs = append(addrs, *call.Addr)
 106                                 }
 107                                 sds := nncp.SDS{"node": node.Id, "callindex": strconv.Itoa(i)}
 108                                 for {
 109                                         n := time.Now()
 110                                         t := call.Cron.Next(n)
 111                                         ctx.LogD("caller", sds, t.String())
 112                                         if t.IsZero() {
 113                                                 ctx.LogE("caller", sds, "got zero time")
 114                                                 return
 115                                         }
 116                                         time.Sleep(t.Sub(n))
 117                                         node.Lock()
 118                                         if node.Busy {
 119                                                 node.Unlock()
 120                                                 ctx.LogD("caller", sds, "busy")
 121                                                 continue
 122                                         } else {
 123                                                 node.Busy = true
 124                                                 node.Unlock()
 125                                                 ctx.CallNode(
 126                                                         node,
 127                                                         addrs,
 128                                                         call.Nice,
 129                                                         call.Xx,
 130                                                         call.RxRate,
 131                                                         call.TxRate,
 132                                                         call.OnlineDeadline,
 133                                                         call.MaxOnlineTime,
 134                                                         false,
 135                                                         nil,
 136                                                 )
 137                                                 node.Lock()
 138                                                 node.Busy = false
 139                                                 node.Unlock()
 140                                         }
 141                                 }
 142                         }(node, i, call)
 143                 }
 144         }
 145         wg.Wait()
 146 }